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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Explosive of old 6 letters:

PETARD: Old explosive device
PETARD: Old explosive device used to breach castle walls
AMATOL: Explosive of old
PETARDS: Explosives, old style
TETRYTOL: Old explosive
TNT: Old-fashioned explosive.
DESKS: Protectors from nuclear explosions, according to old advice